3 files changed, 39 insertions, 3 deletions
diff --git a/python/servo/build_commands.py b/python/servo/build_commands.py
index a8cb0f9e4a9..48de80811ee 100644
--- a/python/servo/build_commands.py
+++ b/python/servo/build_commands.py
@@ -416,9 +416,8 @@ class MachCommands(CommandBase):
         self.set_use_stable_rust()
         self.ensure_bootstrapped()
 
-        env = self.build_env(is_build=True)
+        env = self.build_env(is_build=True, geckolib=True)
         geckolib_build_path = path.join(self.context.topdir, "target", "geckolib").encode("UTF-8")
-        env["CARGO_TARGET_DIR"] = geckolib_build_path
 
         ret = None
         opts = []
diff --git a/python/servo/command_base.py b/python/servo/command_base.py
index 8db1209a6e4..2dbeff53bfb 100644
--- a/python/servo/command_base.py
+++ b/python/servo/command_base.py
@@ -382,7 +382,7 @@ class CommandBase(object):
                                   " --release" if release else ""))
         sys.exit()
 
-    def build_env(self, hosts_file_path=None, target=None, is_build=False):
+    def build_env(self, hosts_file_path=None, target=None, is_build=False, geckolib=False):
         """Return an extended environment dictionary."""
         env = os.environ.copy()
         if sys.platform == "win32" and type(env['PATH']) == unicode:
@@ -519,6 +519,10 @@ class CommandBase(object):
 
         env['GIT_INFO'] = '-'.join(git_info)
 
+        if geckolib:
+            geckolib_build_path = path.join(self.context.topdir, "target", "geckolib").encode("UTF-8")
+            env["CARGO_TARGET_DIR"] = geckolib_build_path
+
         return env
 
     def servo_crate(self):
diff --git a/python/servo/devenv_commands.py b/python/servo/devenv_commands.py
index bb5ed6d2704..8fde8e3b361 100644
--- a/python/servo/devenv_commands.py
+++ b/python/servo/devenv_commands.py
@@ -38,6 +38,24 @@ class MachCommands(CommandBase):
                 return call(["cargo"] + params, env=self.build_env())
         return call(['cargo'] + params, env=self.build_env())
 
+    @Command('cargo-geckolib',
+             description='Run Cargo with the same compiler version and root crate as build-geckolib',
+             category='devenv')
+    @CommandArgument(
+        'params', default=None, nargs='...',
+        help="Command-line arguments to be passed through to Cargo")
+    def cargo_geckolib(self, params):
+        if not params:
+            params = []
+
+        self.set_use_stable_rust()
+        env = self.build_env(geckolib=True)
+
+        if self.context.topdir == getcwd():
+            with cd(path.join('ports', 'geckolib')):
+                return call(["cargo"] + params, env=env)
+        return call(['cargo'] + params, env=env)
+
     @Command('cargo-update',
              description='Same as update-cargo',
              category='devenv')
@@ -97,6 +115,21 @@ class MachCommands(CommandBase):
             params = []
         return call(["rustc"] + params, env=self.build_env())
 
+    @Command('rustc-geckolib',
+             description='Run the Rust compiler with the same compiler version and root crate as build-geckolib',
+             category='devenv')
+    @CommandArgument(
+        'params', default=None, nargs='...',
+        help="Command-line arguments to be passed through to rustc")
+    def rustc_geckolib(self, params):
+        if params is None:
+            params = []
+
+        self.set_use_stable_rust()
+        env = self.build_env(geckolib=True)
+
+        return call(["rustc"] + params, env=env)
+
     @Command('rust-root',
              description='Print the path to the root of the Rust compiler',
              category='devenv')